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Biology
GCSE

Explain how two different species of rabbits could have developed from a common ancestor?

The population of rabbits (common ancestor) must have gotten seperated to form two populations. This could have happened due to a geographical barrier (such as an earthquake). These two ...

PJ
Answered by Precious J. Biology tutor
3554 Views

What is osmosis and how does it differ from diffusion

osmosis is the movement of water Across a semi permeable membrane. Water molecules more from an area of high water concentration to an are of low water. This would bean water would move from an area where...

KF
Answered by Kathryn F. Biology tutor
2660 Views

Identify the various structures in a reflex arc in the context of a pin prick. What is the end response and why is this beneficial?

Stimulus --> receptor --> coordinator --> effector --> response. Pin prick --> skin receptors --> sensory neurone --> relay neurone --> motor neurone --> effector muscle --> ...

SP
Answered by Sai P. Biology tutor
2562 Views

Respiration transfers energy from glucose for muscle contraction. Describe how glucose from the small intestine is moved to a muscle cell.

Glucose is absorbed by diffusion into the bloodstream./ Then blood delivers glucose to muscles in capilleries.

LS
Answered by LUKE S. Biology tutor
17143 Views

Microorganisms cause diseases. The human body has many ways of defending itself against microorganisms. Describe two ways the body prevents the entry of microorganisms.

Any two from:acid in the stomach kills pathogens in food/ skin forms a barrier or produces antimicrobial secretions/ hairs in the nose trap pathogens/ trachea or bronchi has mucus which traps pathogens

LS
Answered by LUKE S. Biology tutor
3085 Views

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